A pot shop worker was shot and wounded during the robbery of a Northridge dispensary over the weekend -- the third medical marijuana robbery the ended in gunfire in the last week, police said.

The heist at MediMar, 8924 Reseda Blvd., was reproted at 9 p.m. Saturday, said Capt. Kevin McClure of the Los Angeles Police Department's Robbery-Homicide Division. The worker was hospitalized and is expected to survive. The take?

... $11,000 in cash, and no weed, McClure said.

So far police don't believe the three pot-shop shootings are related, he said. "The three that Robbery-Homicide is currently investigating -- we have nothing to indicate they are related," he said.